4-Bromobenzocyclobutene CAS 1073-39-8

4-Bromobenzocyclobutene is an organic compound with the molecular formula C₈H₇Br, CAS number 1073-39-8, and molecular weight 183.04. ‌

Physical properties
It is a colorless to light yellow liquid at room temperature, with a density of 1.6±0.1 g/cm³, a melting point of 94-97°C, a boiling point of 221.4±29.0°C (760 mmHg), and a flash point of 92.1±18.7°C. ‌

Chemical properties
4-Bromobenzocyclobutene can be used to synthesize a variety of dibenzocyclobutene monomers, which is an important raw material for resin synthesis.

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Model:
1073-39-8
Brand:
futurechemical
Code:
1073-39-8

Product Description

4-Bromobenzocyclobutene Basic information
Product Name:	4-Bromobenzocyclobutene
CAS:	1073-39-8
MF:	C8H7Br
MW:	183.05
EINECS:
Mol File:	1073-39-8.mol
4-Bromobenzocyclobutene Chemical Properties
Boiling point	118-119 °C(Press: 20 Torr)
density	1.470 g/mL at 25 °C
refractive index	n20/D1.589
Fp	100℃
storage temp.	2-8°C
form	liquid
InChI	InChI=1S/C8H7Br/c9-8-4-3-6-1-2-7(6)5-8/h3-5H,1-2H2
InChIKey	GMHHTGYHERDNLO-UHFFFAOYSA-N
SMILES	C12C(CC1)=CC=C(Br)C=2
CAS DataBase Reference	1073-39-8(CAS DataBase Reference)

4-Bromobenzocyclobutene 1073-39-8 C8H7Br Polybenzocyclobutene resin precursor Matrix resin for high-performance composites High-performance adhesive Special coating agent Functional material precursor

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.